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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑% Z+ `# O+ [% U& ~
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% _" ~) c3 P. I9 C* g凯利指数的计算方法: ( O1 m2 a L3 d; F& D k: K6 G3 D% @: ~% B0 H
7 d0 k3 l* n5 s5 C3 X
G3=S*S',G1=B*B',G0=F*F';(S:胜赔,B:平赔,F:负赔,S'欧平均胜率,B'欧平均平率,F'欧平均负率)
6 W. y8 c& C6 [5 Q6 g9 \% f2 ^什么?对于一家特定的公司,它的主胜的凯利指数G3=S*S'!你选择的公司样本不同,G值就不同,样本大小不同,G值也不同(一般的欧均值都取99家公司,从统计学的意义上来讲,还称不上样本!)这个G带有随意性,大个0.05小个0.08之类的,也只能算做误差,现在要我比较G与0.89哪个大?我大你个0.05怎么了?我小你个0.08又有什么干系? H% P+ \' B9 l U8 T. [
3 a! ~6 Y3 I+ U- ]# C) x- t2 j) O$ H5 @4 O7 p, x: U5 O
& t" ]0 @) w! L( u* H% h
! L# `. Y' {. \/ L既然涉及到平均胜率,那么看一下胜率是怎么求出来的:平均主胜率S'=(S1'+S2'+….Sn')/n,S1'是第一家公司的主胜率,S2'是第二家公司的主胜率,以此类推。主胜率S'=r/S(r:赔付率)。赔付率(返还率)又是这样求的:r=1/(1/S+1/B+1/F),什么??又做梦了!!返还率是庄家也要到裁判终场哨响才知道的,这样也行??AC米兰踢亚特兰大,哨响了,投注比固定了,但踢出3,这场返还率可能是150%,踢出1可能是20%,踢出0,可能是5%,结果不同,返还率也不同啊!这里也可以看到,博彩公司不喜欢操控比赛,因为他想操控的只能是这种强弱分明的比赛,但强队踢假球的成本更高,它想操控也操控不了,最好的选择就是烧烧香:天哪,爆个冷吧!
1 O+ U1 [7 X9 X, v7 k+ c' H4 c7 e6 Z/ _5 C5 S: K8 T8 s
; m; o& X" H! e做下算术了: 2 i( y$ \ W: ~: {8 \" `
7 s5 f+ x4 _/ C3 U- Q9 V- n; ~' L. y! k5 F, M& W+ d
/ @" f/ Y/ S! c9 |(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n1 O( m* r5 T* Y8 U: p8 }% i$ ^1 `
& d) Z, [4 L( M(2)立博: 2.10 3.25 3.00
1 i2 V8 Y! P& e, V: C9 o& T' T. |3 w5 S4 E+ r
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t; N$ B" w1 ]" W& P! T# r! S1 {
4 Y7 [/ a! m& A- K# R(4)易胜博:2.25 3.10 2.95
! C# r. ~1 B+ I+ G0 y) L) I- U+ {+ l. `) m% ~. _
# J6 H0 L) T- W3 S+ x& C我们假设就取这四家公司为某场比赛开出的赔率来计算凯利值 2 S; u" V4 p6 ^, S
5 F8 F, p$ }' ]( i% c
$ s( _& c- o) d: I2 b$ IS1=2.22 B1=3.15 F1=3.01 6 s3 E U# c* o2 J; n
- p- s* K) f( h/ e
S2=2.10 B2=3.25 F2=3.00 " Z' D D# x! d; \$ l
% ^# T/ X4 W2 j% ] s; f3 I+ q- b, ]$ W5 h( e8 i& k8 I
S3=2.20 B3=3.10 F3=2.87 7 p. V$ S$ j: K
9 A' e& q. H7 B1 c9 S5 j" H3 [5 T% K* P
S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \1 C w( z, e( H
8 w( d5 ` _0 H- N/ h7 V4 v+ `) N/ D' `' A/ D& O
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
* e. j# s% Y, z" e1 ~/ Z$ d
* F4 k! n k5 O8 } d! \1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l
2 P# O) G% g, d1 s. [2 h& I0 X. v
Q" J6 R. k. z1/r3=1/S3+1/B3+1/F3=1/2.20+1/3.10+1/2.87 => r3=0.89 % h8 r* k9 }8 X/ Q5 J' q
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ) v6 ?& Y) {5 N
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S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
) S8 P: N5 j8 h5 K5 w; R2 D/ j
) m5 `* v/ K. u2 T! @+ V {7 ]8 o4 S类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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S1'=41 B1'=29 F1'=30; 3 {6 ~% r' `2 P
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
# k0 ?* R1 s, j; r/ y# R; m' V% T, u, P% O3 j6 x+ i: v2 R( ?; k
S3'=40 B3'=29 F3'=31
3 I: G/ u* I9 q% n; ^* A, j6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
6 V- N1 R7 m$ @* F1 `0 uS4'=40 B4'=29 F4'=31 ! \2 e9 b- f! d& x0 m' O6 A
: B6 y" Y' M2 }4 T/ O0 g4 ~0 ^6 }1 d+ \( k& v3 U" _0 i2 G. A
(注意:3,4两家公司,赔率不同,但它们的胜,平,负率相同了) 8 [+ b0 b& X# U( [. o6 t6 [- l7 |+ y) @2 T# S5 j
* R9 Y/ Q" p9 \
( h4 b- @0 V3 w; r2 g好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 1 u2 }! q5 y8 Y5 M: e
) q( ], k9 L T& t% u9 b" z! R+ k/ }* s! E8 I
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 % E* L6 m* h, b' B5 W
2 c" e9 v5 v- F3 A# P7 [+ B# @F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
( t7 K% [ e- f" U4 Y8 N1 U9 n. M4 x! e, m6 u5 g% B' B
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
2 T9 _6 M1 S& X, C7 `$ {2 \3 s. f9 E ]' p: I. D7 h. {# g# r! O0 `6 z: R* R' B# b# ^
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
# c7 c8 W8 y6 N3 N5 Y, u/ J1 N+ D$ n) P# X# M
6 |4 Y* E) O& }- H: ~G11=B1*B'=3.15*28.75=90.56 9 I/ C S) g/ _' D' W9 ^5 u
- Q, k5 v9 C5 S- k8 X+ p8 f; y* jG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
% |2 U% X0 r5 ~9 C& e7 s! M. D t5 J( B- ~7 @% ?6 h& g5 M
当然其它几家公司的凯利值也可以通过同样的方法求得,当然,事实上你不用去求(每场比赛这样求,不累死也气死了),赔率比较网站上都是这样算的。 好,到这里你应该可以知道了,凯利指数是怎么样被扭曲的了,因为除了赔率是真的,其它的都是做梦的时候梦到的(并非是攻击凯利指数,这个,前文和接下来的一比较就可以发现了)。 + J& N& @* n# J/ ]6 \ A# i" b- m- q# d" m0 N
6 C* |* h W0 f7 S7 s3 A2 @. G$ i' _. d% f# @) P/ ?1 S; y9 V
通过对多家凯利指数的对比统计分析可以找出,数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。 |
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数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。 |
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